org.apache.hadoop.fs.Options$ChecksumCombineMode

救命

org.apache.hadoop.fs.Options$ChecksumCombineMode
MapReduce阶段不知道发生了什么，一直报这样一个错误，之前还能好好运行，突然就不行了

问题相关代码

package HW0820;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;

import java.io.IOException;

public class clean {
    public static void main(String[] args) throws Exception {
        //        1.初始化配置
        Configuration conf = new Configuration();
        conf.set("fs.defaultFS","hdfs://hadoop10:9000");
//        2.创建job
        Job job = Job.getInstance(conf);
        job.setJarByClass(clean.class);
        //3. 设置输入格式化工具和输出格式化
        job.setInputFormatClass(TextInputFormat.class);
        job.setOutputFormatClass(TextOutputFormat.class);
        //4. 设置输入路径和输出路径
        TextInputFormat.addInputPath(job,new Path("/day5/video"));
        TextOutputFormat.setOutputPath(job,new Path("/day5/clean"));
        //5. 设置mapper和reducer
        job.setMapperClass(MapClean.class);

        // 6. 设置mapper的kv类型和reducer的kv类型
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(NullWritable.class);
        job.setNumReduceTasks(0);
        // 7. 启动job
        boolean b = job.waitForCompletion(true);
        System.out.println(b);

    }
    static class MapClean extends MapperText,Text, NullWritable>{
        @Override
        protected void map(LongWritable key, Text value, MapperText, Text, NullWritable>.Context context) throws IOException, InterruptedException {

                String replace = value.toString().replace(" ", "");
                String[] split = replace.split("\t", 10);
                String replace1 = split[split.length - 1].replace("\t", "&");
                String[] split1 = replace1.split("&");
                String spid="";
            for (int i = 0;i<20 && i < split1.length; i++) {

                if (i == split1.length-1) {
                    spid=spid+split1[i];
                }else {
                    spid=spid+split1[i]+"&";
                }

            }
                String a = "";
                for (int n=0;n-1;n++) {
                    a+=split[n]+",";
                }
                String all= a+ spid;
                context.write(new Text(all),NullWritable.get());
        }
    }
}

运行结果及报错内容

我的解答思路和尝试过的方法

试过重启、删除，拷贝别人的Maven阿帕奇下载的包都不行

大概率就是这个依赖与其他依赖产生了冲突，题主试一下去pom文件中，更改一下配置，将这个配置删除，就OK了

类找不到异常，依赖问题。
清理本地仓库报错的依赖，重新下载。

idea跑本地数据时，会产生隐藏的crc文件，将该路径下的.xxx.crc文件删掉即可